Overview
Ever wonder which email marketing tool a company uses? Email Detective tells you instantly.
Open any email in Gmail and see a "Sent via Mailchimp" (or Brevo, HubSpot, Klaviyo, etc.) badge right on the subject line. Click it for details: vendor website, authentication status (SPF, DKIM, DMARC), and a link to our independent review when available.
WHAT IT DETECTS:
-90+ email service providers across marketing platforms, newsletter tools, CRM systems, and transactional email services
-Mailchimp, Brevo, HubSpot, Klaviyo, ActiveCampaign, Kit, SendGrid, Mailgun, Salesforce Marketing Cloud, and many more
-Infrastructure providers like SendGrid and Amazon SES, with smart detection that shows the actual marketing platform when possible
FEATURES:
-Instant ESP detection when you open any email
-Clickable badge with ESP details popup
-Email authentication checker (SPF/DKIM/DMARC)
-ESP favicon and vendor website link
-Works in inbox list view for previously opened emails
-100% private: all data stays in your browser
PERFECT FOR:
-Email marketers researching competitors
-Agencies evaluating client tech stacks
-Deliverability specialists checking authentication
-Anyone curious about the tools behind the emails they receive
Built by EmailToolTester.com, the independent email tool review platform with 15+ years of testing experience.
Free. No account required. No data collected.
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🔐 Security Analysis
This extension hasn't been security-scanned yet.
